simplercs: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/simplercs - from package: qtoctave

You may install the required package with command apt-get install {package}

Error in other languages:
simplercs: bevel nie gevind nie
simplercs: comandă negăsită
simplercs: comando não encontrado
simplercs: commande introuvable
simplercs: command not found
simplercs: käsku ei ole
simplercs: không tìm thấy lệnh
simplercs: komanda nerasta
simplercs: Kommando nicht gefunden.
simplercs: kommandot finns inte
simplercs: komut yok
simplercs: nie znaleziono polecenia
simplercs: níor aimsíodh an t-ordú
simplercs: no se encontró la orden
simplercs: no s'ha trobat l'ordre
simplercs: opdracht niet gevonden
simplercs: parancs nem található
simplercs: perintah tidak ditemukan
simplercs: príkaz nenájdený
simplercs: příkaz nenalezen
simplercs: команда не найдена
simplercs: командата не е открита
simplercs: 命令找不到
simplercs: コマンドが見つかりません